Observations

1. Observing Lines & Frequencies	H13CO+ (1-0); 86.75433GHz
2. Observed Regions/target sources	Orion A Giant Molecular Cloud
3. Observing period: 			1999, Dec. - 2004, Apr.

4. Receiver frontend:			BEARS

5. Receiver backend:			AOS, in the period from 1999 to May, 2001
Autocorrelator (AC), from Dec. 2001 to 2004
6. Frequency & Velocity resolutions: 	37 kHz; 0.13 km/s for AOS
31.25 kHz (NONE); 0.13 km/s for AC
7. Total bandwidth & Velocity Coverage:	32 MHz; 260 km/s for AOS
40 MHz; 325 km/s for AC
8. Typical system temperature & typical atmospheric opacity:
200 - 600 K
9. Main-beam efficiency: 
0.51
10. Observation mode: OTF / position switch / frequency switch
Position switch
11. OFF Position (s) if OTF/Position switch is applied;
5h36m15s, -5d2'34"(B1950) and
5h34m14s, -6d12'25"(B1950)
12. Pointing Calibration & Pointing error:
Ori KL SiO maser source, every 1.5 hours, less than 3"
13. Intensity Calibration & Accuracy of absolute scale:
Comparing with S100/80 SSB RX, 10 %
14. Noise level: 
0.1 K in Ta*(DSB)
15. CUBE FITS Information
   Mapping area: 			BLC: 5h34m33s, -6d33'46.6" (B1950)
TRC: 5h31m57s, -4d54'47.6" (B1950)
   Grid spacing:				20.55"
   CUBE size: (x, y, z)			(114, 290, 77)
 
16. Other information